Scientists call mature ecosystem a

for the points

compost can be added to topsoil as a:

pesticide

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

not only is it colder, it also becomes darker, less salty, and more dense.